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# Given BD perpendicular to AC, what is the area of triangle BCD?

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Math Expert
Joined: 02 Sep 2009
Posts: 51122
Given BD perpendicular to AC, what is the area of triangle BCD?  [#permalink]

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24 Jan 2016, 05:24
00:00

Difficulty:

35% (medium)

Question Stats:

92% (01:13) correct 8% (01:41) wrong based on 26 sessions

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Given BD perpendicular to AC, what is the area of triangle BCD?

(2) BD = CD

Attachment:

2016-01-24_1722.png [ 4.1 KiB | Viewed 918 times ]

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Re: Given BD perpendicular to AC, what is the area of triangle BCD?  [#permalink]

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24 Jan 2016, 07:59
In right angled $$\triangle$$ ADB
= 121 - 16 = 105
=>BD =$$105 ^ {1/2}$$

To calculate area of $$\triangle$$ BDC , we need to length of side CD as well.
Not sufficient
(2) BD = CD
Sufficient

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Re: Given BD perpendicular to AC, what is the area of triangle BCD? &nbs [#permalink] 24 Jan 2016, 07:59
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